ijͬѧÉè¼ÆÁËÒ»¸ö²â¶¨Áгµ¼ÓËٶȵÄÒÇÆ÷£¬ÈçͼËùʾ£®ABÊÇÒ»¶ÎÔ²»¡Ðεĵç×裬OµãΪÆäÔ²ÐÄ£¬Ô²»¡°ë¾¶Îªr£®OµãÏÂÓÃÒ»µç×è²»¼ÆµÄ½ðÊôÏßÐü¹Ò×ÅÒ»¸ö½ðÊôÇò£¬ÇòµÄϲ¿ÓëAB½Ó´¥Á¼ºÃÇÒÎÞĦ²Á£®A¡¢BÖ®¼ä½ÓÓÐÄÚ×è²»¼Æ¡¢µç¶¯ÊÆΪ9VµÄµç³Ø£¬µç·ÖнÓÓÐÀíÏëµçÁ÷±íA£¬O¡¢B¼ä½ÓÓÐÒ»¸öÀíÏëµçѹ±íV£®Õû¸ö×°ÖÃÔÚÒ»ÊúֱƽÃæÄÚ£¬ÇÒ×°ÖÃËùÔÚƽÃæÓëÁгµÇ°½øµÄ·½ÏòƽÐУ®ÏÂÁÐ˵·¨ÖÐÕýÈ·µÄÓУ¨¡¡¡¡£©
·ÖÎö£ºÍ¨¹ýСÇòµÄºÏÁ¦·½ÏòÈ·¶¨ÁгµµÄ¼ÓËٶȷ½Ïò£¬µ±¼ÓËÙ¶ÈÔö´óʱ£¬Åжϳö¦È½ÇµÄ±ä»¯£¬´Ó¶øµÃÖªBC¶Îµç×èµÄ±ä»¯£¬¸ù¾Ý±ÕºÏµç·ŷķ¶¨ÂÉÅжϵçÁ÷ºÍµçѹµÄ±ä»¯£®
½â´ð£º½â£ºA¡¢Ð¡ÇòËùÊܵĺÏÁ¦Ë®Æ½ÏòÓÒ£¬ÖªÁгµÏòÓÒ×ö¼ÓËÙÔ˶¯»òÏò×ó×ö¼õËÙÔ˶¯£®¹ÊA´íÎó£®
B¡¢Ð¡ÇòµÄ¼ÓËÙ¶Èa=gtan¦È£¬µ±¼ÓËÙ¶ÈÔö´ó£¬¦ÈÔö´ó£¬BC¶Îµç×èÔö´ó£¬ÒòΪ×ܵç×è²»±ä£¬ËùÒÔµçÁ÷²»±ä£¬BC¶ÎµçѹÔö´ó£®¹ÊB´íÎó£®
C¡¢µ±µçѹ±íΪ3Vʱ£¬ÖªBC¶ÎµÄµç×èÊÇ×ܵç×èµÄÈý·ÖÖ®Ò»£¬Ôò¦È=30¡ã£¬Ôòa=gtan30¡ã=
3
3
g
£®¹ÊCÕýÈ·£®
D¡¢¸ù¾Ýa=gtan¦ÈÖª£¬aÓë¦È²»³ÉÕý±È¹Øϵ£¬ÒòΪµçÁ÷²»±ä£¬µçѹ±íʾÊýµÄ´óСÓëµç×è³ÉÕý±È£¬BC¶Îµç×èÓë¦È³ÉÕý±È£¬ËùÒÔaÓëµçѹ±íʾÊýµÄ¹Øϵ²»³ÉÕý±È£¬ËùÒÔ¼ÓËٶȱíµÄ¿Ì¶È²»¾ùÔÈ£®¹ÊDÕýÈ·£®
¹ÊÑ¡CD£®
µãÆÀ£º±¾Ì⽫±ÕºÏµç·ŷķ¶¨ÂÉÓëÅ£¶ÙµÚ¶þ¶¨ÂÉ×ۺϣ¬¹Ø¼üÖªµÀ¦ÈÓë¼ÓËٶȵĹØϵ£¬¦ÈÓëBC¶Îµç×èµÄ´óС¹Øϵ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ijͬѧÉè¼ÆÁËÒ»¸ö²â¶¨Ô²ÖÜÔ˶¯½ÇËٶȵÄʵÑéÔÚÈçͼ¼×ËùʾµÄ×°ÖÃÖУ¬ÀûÓÃÅçÆáÍ°Äܹ»ÏòÍâÅçÉäËÙ¶ÈÒ»¶¨µÄÓÍÆáÎíµÎ£¨ÅçÉäËÙ¶Èv0¿ÉÑ¡Ôñ²»Í¬ÖµÇÒΪÒÑÖª£©£¬Ò»¸öÖ±¾¶ÎªD=40cmµÄÖ½´ø»·£¬°²·ÅÔÚÒ»¸ö¿ÉÒÔ°´ÕÕÒ»¶¨×ªËÙת¶¯µÄ¹Ì¶¨×ªÌ¨ÉÏ£¬Ö½´ø»·ÉÏ¿ÌÓÐÒ»ÌõÏÁ·ìA£¬ÔÚÏÁ·ìAµÄÕý¶ÔÃæ»­Ò»Ìõ±êÖ¾Ïߣ®ÎíµÎËùÊܵĿÕÆø×èÁ¦¼«Ð¡£¬¿ÉºöÂÔÔÚת̨¿ªÊ¼×ª¶¯´ïµ½Îȶ¨×ªËÙʱ£¬Ïò²àÃæͬÑù¿ªÓÐÏÁ·ìBµÄÖ½ºÐÖÐÅçÉäÓÍÆáÎíµÎ£¬µ±ÏÁ·ìAתÖÁÓëÏÁ·ìBÕý¶ÔƽÐÐʱ£¬ÎíµÎ±ãͨ¹ýÏÁ·ìAÔÚÖ½´øµÄÄÚ²àÃæÁôϺۼ££®¸Ä±äÅçÉäËÙ¶ÈÖظ´ÊµÑ飬ÔÚÖ½´øÉÏÁôÏÂһϵÁеĺۼ£a¡¢b¡¢c¡¢D£®½«Ö½´ø´Óת̨ÉÏÈ¡ÏÂÀ´£¬Õ¹¿ªÆ½·Å£¬ÈçͼÒÒËùʾ

ÒÑÖªv0£¾
¦Ø?D¦Ð
£¬ÇëÄã°ï¸ÃͬѧÍê³ÉÏÂÁÐÈÎÎñ£º
£¨1£©ÉèÅçÉäµ½Ö½´øÉϵÄÓÍÆáÎíµÎºÛ¼£µ½±êÖ¾ÏߵľàÀëΪS£¬Ôò
´ÓͼÒÒ¿ÉÖª£¬ÔÚa¡¢b¡¢c¡¢dËĸöµãÖÐËÙ¶È×î´óµÄÎíµÎµ½±êÖ¾ÏߵľàÀëS1=
0.70
0.70
cm£®£»
£¨2£©ÈôÎíµÎÅçÉäËÙ¶ÈΪv0£¬ÊÔÇó½âת̨ת¶¯µÄ½ÇËٶȦØΪ¶àÉÙ£¿£¨ÓÃ×Öĸ±íʾ£©
£¨3£©ÈôÒÔ×Ý×ø±ê±íʾÎíµÎËÙ¶Èv0¡¢ºá×ø±ê±íʾÎíµÎ¾à±êÖ¾Ïß¾àÀëµÄµ¹Êý1/s£¬»­³öv0-1/sͼÏßÈçͼ±ûËùʾ£¬ÊÔ¼ÆËãת̨ת¶¯µÄ½ÇËٶȦØÖµ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2005?ÄϾ©¶þÄ££©ÔÚÑо¿ÐÔѧϰÖУ¬Ä³Í¬Ñ§Éè¼ÆÁËÒ»¸ö²â¶¨´øµçÁ£×ӱȺɵÄʵÑ飬ÆäʵÑé×°ÖÃÈçͼËùʾ£®abcdÊÇÒ»¸ö³¤·½ÐκÐ×Ó£¬ÔÚad±ßºÍcd±ßÉϸ÷¿ªÓÐС¿×fºÍe£¬eÊÇcd±ßÉϵÄÖе㣬ӫ¹âÆÁMÌù×Åcd·ÅÖã¬ÄÜÏÔʾ´Óe¿×Éä³öµÄÁ£×ÓÂäµãλÖ㮺Ð×ÓÄÚÓÐÒ»·½Ïò´¹Ö±ÓÚabcdƽÃæµÄÔÈÇ¿´Å³¡£¬´Å¸ÐӦǿ¶È´óСΪB£®Á£×ÓÔ´²»¶ÏµØ·¢ÉäÏàͬµÄ´øµçÁ£×Ó£¬Á£×ӵijõËٶȿɺöÂÔ£®Á£×Ó¾­¹ýµçѹΪUµÄµç³¡¼ÓËٺ󣬴Óf¿×´¹Ö±ÓÚad±ßÉäÈëºÐÄÚ£®Á£×Ó¾­´Å³¡Æ«×ªºóÇ¡ºÃ´Óe¿×Éä³ö£®ÈôÒÑÖªfd=cd=L£¬²»¼ÆÁ£×ÓµÄÖØÁ¦ºÍÁ£×ÓÖ®¼äµÄÏ໥×÷ÓÃÁ¦£®ÇëÄã¸ù¾ÝÉÏÊöÌõ¼þÇó³ö´øµçÁ£×ӵıȺÉq/m£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2011?ºþ±±¶þÄ££©Ä³Í¬Ñ§Éè¼ÆÁËÒ»¸ö²â¶¨ÓÍÆáÅçǹÏòÍâÅçÉäÓÍÆáÎíµÎËٶȵÄʵÑ飮Ëû²ÉÓÃͼ£¨1£©ËùʾµÄ×°Ö㬸ÃÓÍÆáÅçǹÄܹ»ÏòÍâÅçÉäËÄÖÖËٶȴóС²»Í¬µÄÓÍÆáÎíµÎ£¬Ò»¸öÖ±¾¶ÎªDµÄÖ½´ø»·£¬°²·ÅÔÚÒ»¸ö¿ÉÒÔ°´ÕÕÒ»¶¨×ªËÙת¶¯µÄ¹Ì¶¨×ªÌ¨ÉÏ£¬Ö½´ø»·ÉÏ¿ÌÓÐÒ»ÌõÏÁ·ìA£¬ÔÚÏÁ·ìAµÄÕý¶ÔÃæ»­Ò»Ìõ±êÖ¾Ïߣ¬ÔÚת̨¿ªÊ¼×ª¶¯´ïµ½Îȶ¨½ÇËٶȦØʱ£¬Ïò²àÃæͬÑù¿ªÓÐÏÁ·ìBµÄÖ½ºÐÖÐÅçÉäÓÍÆáÎíµÎ£¬µ±ÏÁ·ìAתÖÁ¿¿½üÏÁ·ìBÇÒÓë֮ƽÐÐÕý¶Ôʱ£¬ÎíµÎ±ãͨ¹ýÏÁ·ìAÔÚÖ½´øµÄÄÚ²àÃæÁôϺۼ££®¸Ä±äÅçÉäËÙ¶ÈÖظ´ÊµÑ飬ÔÚÖ½´øÉÏÁôÏÂһϵÁеĺۼ£a¡¢b¡¢c¡¢d£®½«Ö½´ø´Óת̨ÉÏÈ¡ÏÂÀ´£¬Õ¹¿ªÆ½·ÅÔڿ̶ȳßÅԱߣ¬Èçͼ£¨2£©Ëùʾ£¬Èç¹û²»¼ÆÎíµÎËùÊܵÄÖØÁ¦ºÍ¿ÕÆø×èÁ¦£®

£¨1£©ÓÃvmin±íʾËÄ´ÎʵÑéÖÐÓÍÆáÎíµÎµÄ×îСËٶȣ¬ÈôÒª±£Ö¤ËÄ´ÎʵÑéÎíµÎ¶¼ÔÚÖ½´ø»·×ª¶¯°ëȦµÄʱ¼äÄÚ´ïµ½Ö½´ø»·£¬ÔòÖ½´ø»·×ª¶¯µÄ½ÇËٶȦØÓ¦Âú×ãµÄÌõ¼þÊÇ£º
¦Ø=
vmin¦Ð
D
¦Ø=
vmin¦Ð
D
£®
£¨2£©ÔÚÂú×㣨1£©µÄÌõ¼þÏ£¬ÈôD=40cm£¬¦Ø=2.4rad/s£¬ÓÉͼ£¨b£©¿ÉÖªËÄ´ÎʵÑéÖÐÅçÉäËÙ¶È×î´óµÄÎíµÎËÙ¶Èvmax=
32
32
m/s£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

ijͬѧÉè¼ÆÁËÒ»¸ö²â¶¨¼¤¹â²¨³¤µÄʵÑé×°ÖÃÈçͼ¼×Ëùʾ£¬¼¤¹âÆ÷·¢³öµÄÒ»ÊøÖ±¾¶ºÜСµÄºìÉ«¼¤¹â½øÈëÒ»¸öÒ»¶Ë×°ÓÐË«·ì¡¢ÁíÒ»¶Ë×°ÓийâƬµÄÕÚ¹âͲ£¬¸Ð¹âƬµÄλÖÃÉϳöÏÖÒ»ÅŵȾàµÄÁÁµã£¬Í¼ÒÒÖеĺڵã´ú±íÁÁµãµÄÖÐÐÄλÖã®
£¨1£©Í¨¹ýÁ¿³öÏàÁÚ¹âµãµÄ¾àÀë¿ÉËã³ö¼¤¹âµÄ²¨³¤£¬¾Ý×ÊÁϽéÉÜ£¬ÈôË«·ìµÄ·ì¼ä¾àÀëΪa£¬ÔòË«·ìµ½¸Ð¹âƬµÄ¾àÀëΪL£¬¸Ð¹âƬÉÏÏàÁÚÁ½¹âµã¼äµÄ¾àÀëΪb£¬Ôò¹âµÄ²¨³¤v=1m/s£®¸Ãͬѧ²âµÄL=1.0000m£¬Ë«·ì¼ä¾àa=0.220mm£¬ÓôøÊ®·Ö¶ÈÓαêµÄ¿¨³ß²â¸Ð¹âƬÉϵĵã¼ä¾àʱ£¬³ßÓëµãµÄÖÐÐÄλÖÃÈçͼÒÒËùʾ£®Í¼ÒÒÖеÚÒ»¸ö¹âµãµ½µÚËĸö¹âµãµÄ¾àÀëÊÇ
 
mm£®ÊµÑéÖм¤¹âµÄ²¨³¤¦Ë=
 
m£¨±£ÁôÁ½Î»ÓÐЧÊý×Ö£©
£¨2£©Èç¹ûʵÑéʱ½«ºì¼¤¹â»»³ÉÀ¶¼¤¹â£¬ÆÁÉÏÏàÁÚÁ½¹âµã¼äµÄ¾àÀ뽫
 
£®£¨±ä´ó¡¢±äС¡¢²»±ä£©
¾«Ó¢¼Ò½ÌÍø

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÔĶÁÀí½â

I ÀûÓÃͼ10ÖÐËùʾµÄ×°ÖÿÉÒÔÑо¿×ÔÓÉÂäÌåÔ˶¯£®ÊµÑéÖÐÐèÒªµ÷ÕûºÃÒÇÆ÷£¬½Óͨ´òµã¼ÆʱÆ÷µÄµçÔ´£¬ËÉ¿ªÖ½´ø£¬Ê¹ÖØÎïÏÂÂ䣮´òµã¼ÆʱÆ÷»áÔÚÖ½´øÉÏ´ò³öһϵÁеÄСµã£®
£¨1£©ÎªÁ˲âµÃÖØÎïÏÂÂäµÄ¼ÓËٶȣ¬»¹ÐèÒªµÄʵÑéÆ÷²ÄÓÐ
 
£®£¨ÌîÈëÕýÈ·Ñ¡ÏîÇ°µÄ×Öĸ£©
A£®ÌìƽB£®Ãë±íC£®¿Ì¶È³ß
£¨2£©ÈôʵÑéÖÐËùµÃµ½µÄÖØÎïÏÂÂäµÄ¼ÓËÙ¶ÈֵСÓÚµ±µØµÄÖØÁ¦¼ÓËÙ¶ÈÖµ£¬¶øʵÑé²Ù×÷ÓëÊý¾Ý´¦Àí¾ùÎÞ´íÎó£¬Ð´³öÒ»¸öÄãÈÏΪ¿ÉÄÜÒýÆð´ËÎó²îµÄÔ­Òò£º
 
£®
II£¨5·Ö£©ÎªÁ˲âÁ¿µçÔ´µÄµç¶¯ÊƺÍÄÚ×裬ÔÚʵÑéÊÒÀïÎÒÃÇͨ³£²Éȡͼ¼×Ëùʾµç·²âÁ¿£¬Çë¸ù¾Ý¸Ãµç·ͼÔÚͼÒÒÖÐÁ¬½ÓʵÎïͼ
 
£®
¾«Ó¢¼Ò½ÌÍø
IIIijͬѧÉè¼ÆÁËÒ»¸ö²â¶¨¼¤¹â²¨³¤µÄʵÑé×°ÖÃÈçͼ¼×Ëùʾ£¬¼¤¹âÆ÷·¢³öµÄÒ»ÊøÖ±¾¶ºÜСµÄºìÉ«¼¤¹â½øÈëÒ»¸öÒ»¶Ë×°ÓÐË«·ì¡¢ÁíÒ»¶Ë×°ÓийâƬµÄÕÚ¹âͲ£¬¸Ð¹âƬµÄλÖÃÉϳöÏÖÒ»ÅŵȾàµÄÁÁµã£¬Í¼ÒÒÖеĺڵã´ú±íÁÁµãµÄÖÐÐÄλÖã®
£¨1£©Í¨¹ýÁ¿³öÏàÁÚ¹âµãµÄ¾àÀë¿ÉËã³ö¼¤¹âµÄ²¨³¤£¬¾Ý×ÊÁϽéÉÜ£¬ÈôË«·ìµÄ·ì¼ä¾àÀëΪa£¬Ë«·ìµ½¸Ð¹âƬµÄ¾àÀëΪ¸Ð¹âƬÉÏÏàÁÚÁ½¹âµã¼äµÄ¾àÀëΪb£¬Ôò¹âµÄ²¨³¤¦Ë=
abL
£®¸Ãͬѧ²âµÃL=1.0000m£¬Ë«·ì¼ä¾àa=0.22mm£¬Óôø10·Ö¶ÈÓαêµÄ¿¨³ß²â¸Ð¹âƬÉϵĹâµã¼ä¾àʱ£¬³ßÓëµãµÄÖÐÐÄλÖÃÈçͼÒÒËùʾ£®Í¼ÒÒÖеÚÒ»¸ö¹âµãµ½µÚËĸö¹âµãµÄ¾àÀëÊÇ
 
mm£®ÊµÑéÖм¤¹âµÄ²¨³¤¦Ë=
 
m£¨±£ÁôÁ½Î»ÓÐЧÊý×Ö£©
£¨2£©Èç¹ûʵÑéʱ½«ºì¼¤¹â»»³ÉÀ¶¼¤¹â£¬ÆÁÉÏÏàÁÚÁ½¹âµã¼äµÄ¾àÀ뽫
 
£®£¨Ñ¡Ìî±ä´ó¡¢±äС¡¢²»±ä£©
¾«Ó¢¼Ò½ÌÍø

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸